EP 2805572 A1 20141126 - AUXILIARY POWER SUPPLY FOR LIGHTING DRIVER CIRCUITRY
Title (en)
AUXILIARY POWER SUPPLY FOR LIGHTING DRIVER CIRCUITRY
Title (de)
NOTSTROMVERSORGUNG FÜR BELEUCHTUNGSTREIBERSCHALTUNG
Title (fr)
ALIMENTATION ÉLECTRIQUE AUXILIAIRE POUR CIRCUITERIE DE PILOTAGE D'ÉCLAIRAGE
Publication
Application
Priority
- US 201261588838 P 20120120
- US 2013022426 W 20130121
Abstract (en)
[origin: WO2013110044A1] Techniques for supplying auxiliary power to lighting driver circuitry are disclosed. An auxiliary power supply can be used, for example, to provide auxiliary power to a current source that drives an LED string. In some embodiments, the LED string is effectively used as a series resistor to charge a capacitor that provides the auxiliary voltage Vaux. As soon as the capacitor is charged to a given threshold, the LED string can be disconnected from the capacitor and the current through the LED string bypasses the auxiliary supply circuit. Thus, the current source provides a current through the LED string, which in turn may be selectively fed to the auxiliary power supply to provide auxiliary power back to the current source or to provide auxiliary power to other circuitry.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP KR US)
G01R 31/2635 (2013.01 - KR); G01R 31/40 (2013.01 - KR); G01R 31/44 (2013.01 - KR); H01L 25/167 (2013.01 - EP US); H01L 27/156 (2013.01 - US); H01L 33/62 (2013.01 - US); H02M 1/4208 (2013.01 - EP); H02M 3/156 (2013.01 - EP); H02M 7/06 (2013.01 - EP US); H02S 50/00 (2013.01 - EP); H05B 45/00 (2020.01 - US); H05B 45/10 (2020.01 - US); H05B 45/20 (2020.01 - EP US); H05B 45/37 (2020.01 - KR US); H05B 45/375 (2020.01 - KR); H05B 45/38 (2020.01 - KR); H05B 45/395 (2020.01 - EP KR US); H05B 45/40 (2020.01 - US); H05B 45/48 (2020.01 - EP KR US); H05B 45/58 (2020.01 - US); G01R 31/2635 (2013.01 - EP US); G01R 31/40 (2013.01 - EP US); G01R 31/44 (2013.01 - EP US); G01R 31/64 (2020.01 - US); H01L 25/0753 (2013.01 - EP US); H01L 2224/48091 (2013.01 - EP US); H01L 2224/48227 (2013.01 - EP US); H01L 2224/48247 (2013.01 - EP US); H01L 2924/12032 (2013.01 - EP US); H01L 2924/12044 (2013.01 - EP US); H01L 2924/1301 (2013.01 - EP US); H01L 2924/13033 (2013.01 - EP US); H01L 2924/1305 (2013.01 - EP US); H01L 2924/13091 (2013.01 - EP US); H02M 1/0006 (2021.05 - EP); H02M 1/0045 (2021.05 - EP); H02M 1/15 (2013.01 - EP); H02M 1/4258 (2013.01 - US); H02M 1/44 (2013.01 - EP); H02M 3/335 (2013.01 - US); Y02B 20/30 (2013.01 - EP US); Y02B 70/10 (2013.01 - EP); Y02E 10/50 (2013.01 - EP)
Citation (search report)
See references of WO 2013110044A1
Citation (examination)
- US 2012176037 A1 20120712 - LEE DONG-WON [KR]
- WO 2011027299 A2 20110310 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013110044 A1 20130725; CN 104335680 A 20150204; CN 104335680 B 20170721; EP 2805572 A1 20141126; KR 20140124379 A 20141024; US 2014361623 A1 20141211; US 9859812 B2 20180102
DOCDB simple family (application)
US 2013022426 W 20130121; CN 201380015253 A 20130121; EP 13702555 A 20130121; KR 20147023254 A 20130121; US 201314373075 A 20130121